The product was mislabeled. Claimed 24v when I ordered a 12v inverter. After checking the plug, it turned out to be a 12 volt DC to 120 volt AC inverter. After 2 weeks of use I am satisfied with the performance. The digital display is useful for DC and AC. I use it to start my water pump. I was concerned that the inverter would not withstand the power surges at startup. But to my surprise, the inverter copes well with it even at a low DC voltage of 11.5 V. The instructions could be more detailed. Addendum: After 8 months of use, I am very satisfied with the quality. It works very well and even after a big storm when the inverter got wet it worked. I was shocked.